Construction of soundproof floors



DEC. 31, 1935. D GREEN CONSTRUCTION OF sOUNDPHooF FLOORS Filed Aug. 3l, 1935 reen Da Qj/a s Ha ra/q/ Patented Dec. 31 1935 UNITED STATES PATENTv OFFICE CONSTRUCTION OF SOUNDPROOF FLOORS Application August 31, 1935, Serial No. 38,732 In Great Britain September 7, 1934 2 Claims.

This invention relates to the construction of sound-proof floors and has for its object the construction in a simpler and more effective way than has obtained in known methods of con- 5 struction.

This invention consists in a floor construction consisting of building elements of reinforced concrete or equivalent material of channel section laid side by side to each other with the ribs extending in an upward direction and having their inner sides provided with divergently disposed surfaces adapted to form abutments, a series of bridge pieces arranged at intervals along the length of said elements adapted to lit tightly against the said diverging ribs and a resilient pad or equivalent device mounted on the upper part of each of said bridge pieces for supporting the floor joists and also in constructive details in connection therewith.

In order that the invention may be the better understood I will now proceed to describe the same in relation to the accompanying drawing, reference being had to the letters and figures marked thereon. Like letters refer to like parts in the various figures in which:-

Fig. 1 is a perspective View of a floor constructed inaccordance with the invention.

Fig. 2 is a ,modified construction of a iioor for carrying heavy loading.

According to one form of the invention as shown in Figure 1 a series of channel sectioned building elements a preferably formed of reinforced concrete are laid side by side with the ribs b of the elements a standing in an upward direction to constitute the main portion of the iioor for carrying the weight to be imposed upon it. The ribs b of each of the building elements a are provided with surfaces c divergently disposed to one another and between the ribs b of each element a series of bridge pieces d are disposed the ends of which are at a corresponding angle so as to effectively coact with the diverging surfaces c of each pair of ribs b so as to be supported on and between the ribs as arches with a clear space both above and below each bridge piece d. These bridge pieces d are situated at convenient intervals along the length of each building element a and the upper part of each bridge piece d carries a resilient pad e or equivalent device on which the ordinary floor joists f rest and carry the flooring boards g in the usual way. In some cases the modified construction shown in Figure 2 is used in which the outer sur- 5 faces h of the ribs b of each building element a are formed at an angle to the horizontal slightly less than a right angle so that a space or recess i is left between the ribs b of two adjacent building elements a which space is lled up with grouting g' and if necessary containing additional reinforcement lc in order to provide a stronger rib structure and a more substantial abutment to take the reaction of the stresses produced laterally by the load transmitted by the joists f to l5 the bridge piecesd on to the ribs b. By this invention the wooden floor boards g and the lower horizontal parts of the building elements a form diaphragms with a considerable volume of air space between them and vibrations set up by 2o sound in the wooden iioor are absorbed by the damping pads e before it can be transmitted by the bridge pieces d to the upstanding ribs b of the building elements a.

I claim:-

1. A iioor construction consisting of building elements of reinforced concrete or equivalent material of channel section laid side by side to each other with the ribs extending in an upward direction and having their inner sides provided with divergently disposed surfaces adapted to form abutments, a series of bridge pieces arranged at intervals along the length of said elements adapted to tightly t against the said diverging ribs and a resilient pad or equivalent device mounted on the upper part of each of said bridge pieces for supporting the iioor joists, substantially as described.

2. In a oor construction as claimed in claim 1 the provision of a recess or space between the outer faces of the adjacent element for nearly the Whole depth of the ribs which is grouted up after the elements have been placed in position to form a more substantial abutment for the bridge pieces and a stronger rib structure, substantially as described.

DOUGLAS HAROLD GREEN. 

